In the manual they give you a nifty piece of code to display fps and cpu uti:
fps & " FPS, " & round(cpuutilisation * 100) & "% CPU (" & renderer & ")"
I could have swore I came across a tutorial that also allowed you get how much memory it was currently consuming but I cannot seem to find it anymore. Does anyone have an idea of how to implement this? I see ImageMemoryUsage but that is just for images.